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Report Number : 71830 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 02/10/2010 <br /> Project Name : 1 Q10 QMS - STTC <br /> Project Number : 185702030.200.005 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov. Diff. <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov. Recov. Diff. Limit Limit <br /> Toluene <br /> 71836-05 <0.50 40.3 40.3 43.7 43.3 ug/L EPA 8260B 2/4/10 108 107 0.869 80-120 25 <br /> Hexavalent Chromium <br /> 71833-01 < 1.0 5.00 5.00 4.98 5.13 ug/L EPA 7199 2/3/10 99.6 103 3.05 90.0-110 10 <br /> TPH as Diesel <br /> BLANK <50 1000 1000 1080 1070 ug/L M EPA 8015 2/4/10 108 107 0.890 70-130 25 <br /> v <br /> m <br /> 0 <br /> w <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />